Closed top stove



gamma July 9, 1935. P. HOLLMAN CLOSED TOP STOVE 2 Sheets-Sheet 1 FiledApril 20, 1931 July 9, 1935. P. I. HOLLMAN 2,007,446

CLOSED TOP STOVE Filed April 20, 1931 2 Sheets-Sheefi 2 Patented July 9,1935 Tomes STAT v oLosEn 'rorsrovn Peter li llollmain, Rockford, 111.,assignor. to Geo. V D Roper Corporation, Rockford, Ill-l 1 ration ofIllinois Application April 20,1931, Serial- No; 531.281 .11 claims.(ones-39),

invention relates to ranges and more particularly. closed topstove's,and has; special ref:

erence to concealment of the f'manifold on stoves" of that type.

The principal (lbJtXZ t of my invention is to pro vide a stove of thekind mentioned with a housing for: the concealment of the manifold. andcooks, so constructed with arena and outlet openings below and abovethe. cocks and manifold to insure good circulation of air .through'thehousing to keep these partsfrom getting too hot, whereby and insureeasyoperation thereof at all times.

Another object consists in' the provision of 'a baffle within thehousing to promote air circulation therethrough, the said baflle beingfurther so constructed as todeflect heat of the burners awayfroin thecocks and manifold and more or less completely insulate the combustionchamber from the aforesaid housing. J Still another object is. toprovide a heat deflector for the cross' pipe that delivers to theymanifold, tominirnize the heating of said. pipe; said deflector beingsuitablyformed of sheet metal and arranged to be placed over the sideof-the cross pipe against thefburn'er boxendhwall to enclose the sameisolated from the combustion chamber. V 7

Other objects of the invention willappear in the course of the followingdetailed description, in; which reference is madeto the. accompanyingdrawings,whereinf H ,j

Figure 1 is a front view of the cooking top portion of a gas rangeembodying my invention;

7 Big. 2 is a longitudinal vertical section of Fig ure 1; v Fig.3 is anofFig.2,and Fig. 4 is a sectional detail on thegline 4- 4 of The, samereference numerals are applied to corresponding parts throughout theviews." The invention is herein illustrated anddescribed as embodied inaclosed top stove. Stoves of that type present amuch-more'difiicult'problern in the concealment of the manifold thanopen top stovesbecausethe concealment of the mam;- fold meansconfinement in the heatof the burners. to the-cocks by conduction andcauses the drying out of the lubricant therein so that the cooks eitherstick or turn with great difficulty. 1 While the inventionisparticularlyadapted for use with closed top stoves because ofthefefiicient way it affords of cooling the ma i endmks m h enlargementof the front portion The heat is transmitted from the manifoldconcealed,]it should beunderstood that the invention islapplicable toopentop stoves as well.

Thejclosed top "stove illustrated is generallysimilar to that disclosedin thecopending application of Stanleyl-LI-Iobson, Serial 15105193276, 5

filed May 21, .1927, which has matured into Pat. No. 1,878,143, Sept.20, 1932. The cooking top, indicated" generallyby the reference numeral5, has the usual oven section 6 atone side thereof andfa back splasherwall I behind the same. 8 10 v indiiiates the burner jbox back, and 9the burner to prevent drying out of lubricant in the cooks boxf'endWalls, drawer l0, commonly referred to as auutili'ty drawer; jis"slidably mounted in the burner; boxj undera suitable drip pan H. The

cooking top; as. stated before, is of the closed type 7 and has'topplates [l2 set in the openings therein so as to present asmooth flat topsurface on which .tof'place. the cooking utensils, and these top platesin turdhave openingsfclosed by removable lids, the number'of openingsdepending upon the numher of burners'employed. One of the'front cookin'gtop hurn'ersis indicated at l3, and. one of the fear buiinersat l4, itvbeing customary to provide two in a frontjset and two inja rear set, asis wellknown, The manifolds for the rear burners I may be of anyordinary conventional form, but the manifoldstfi for the front burnersl3 are elongated to the desired length and given a reverse bend,'asindicated at H, to communicate with the burners I3 from the rear, thusallowing .the desired length of travel of the gas and air for good.'mixture despite the close proximity of the burners 3. with the gassupply manifold ll due to thelocation ,of the latter beneath and withinthe cooking top for concealment. The gas supply manifold in.th'eI-Iobson application above referred to was not concealed, butdisposed out in front, of the cooking top, and that accounts for the..factj'that in that case it was possible to use .front'burners ofordinarystandard form. A bot- 40 tom plate. 18 iisf nounted under thecooking top 5 between the top plate I? and the burners, and thusprovides a confined combustion chamber I9 abovethe' same anda secondaryair chamber 20 below the same above the drippan I l. The bottom plateserves as a support for the burners in ,the'manner shown. Thebottomplate, in accordance with the Hpobson application, has secondary airopenings 2! conforming to the arrangement of the flame ports of theburners and defined .by upstanding 7 flanges 22. The combustion chamber[9, communicates at the rear of the cooking top with a flueoutlet 23 forconducting the products of] combustion from the stove. So much for ageneral. understanding of the construction of 5 through the opening 3|.

' its lower end on the base band and provides a support at its upper endfor the cooking top. The said burner box front 24 is provided with anopen ing 25 in the lower portion thereof for the reception of the drawer0 beneath a cross-bar 21 which is cast as an integral part of the front.The upper portion of the burner box front is cast to provide ahorizontal outwardly projecting housing 28. The housing 28 is formed bya-substan tially vertical front wall 29 and a downwardly inclinedforwardly projecting top wall 30. "The bottom of the housing is open asappears at 3| all the way from the lower edge of the front wall 28 tothe top of the crossbar 21. Now, lugs 32 are suitably cast integral withthe inside of the front wall 29 formed at their'inner ends for receptionof the manifold I1, and clips 3.3, fastened as by means of screws 34 toother lugs35 cast integral with the inside of the front wall 29 belowthe lugs 32, serve to clamp the manifold H in place. The manifold whenso clamped is disposed substantially centrally in the housing 28 atthelevel of approximately the middle of the front wall 29, above theopening 3| and below another opening 35' which reaches horizontallyacross the upper portion of thefront wall 29 substantially the fulllength of the housing. The bottom of the opening 35 is defined by aninwardly projecting curved flange 37, the purpose of which is mainly togive a'pleasing appearance, but which serves to better a; conceal themanifold from view through the i0 4 opening 36. The top of the openingdoesnotrequire a similar provision, but shoulders 38 are provided abovethe opening for a purposewhich will soon appear, as a result of theextensionlupwardly of the flange 31 at the opposite ends of the opening36, as appears at 39.

Specially designed cocks 40 have upwardly projecting threaded shanks 4|threading into holes provided in the bottom of the manifold I! so as todepend from the manifold and provide for a proper. elevation of therearwardly projecting discharge nipples 42 with respect to the shutters43, of the burner manifolds. The cocks 40 have forwardlyprojec'tingstems 44 terminating just behind the front wall 29 of the housing 28 butapproximately centrally disposed with respect toopenings 45 provided inthe lower portion of said wall, preferrably as notches inthe'lower edgethereof. Handies 45 have their shanks 4| detachably secured to the stems44 of the cocks 40 as by means of set screws 48, the said shanks beingentered freely through the openings 45 for. operation of the cooks bymeans of the handles from outside the housing 28. Removal of the handles46 from the stems 44 permits turning of the cooks for threading orunthreading the same on the manifold, and, of course. the cooks are.easily accessible A removable, grid may if desired be provided for theopening 3|.

In operation, itwill be seen that when the cook 40 for any burner isopened by turning the handle 46 thereof, primary air is drawn in throughthe opening 3| in the burner box front 24 for delivery with the gasthrough the shutter 43 to the burner, and other air to supportcombustion, referred to usually as secondary air, is

also drawn in through the opening 3| into the secondary air chamber 25as a result of the draft created in the operation of the burner. Aplurality of holes 5| are provided in the end wall 9 adjacent the bottomplate |8 to admit as much more secondary air as may be required for goodcombustion. The cocks 40 are practically in the direct path of travel ofthe air entering through the opening 3|, and this naturally keeps thesame fairly cool, but the crosspipe 52, that supplies gas to themanifold I1, is found to cause heating of the manifold I! by conductionto such an extent that if no provision were made 'forcooling ofthe'manifold, the cocks would be subjected to undesirable heating byconduction from the manifold. It is for that reason that I=have providedthe upper opening 35 preferably just above and fairly close to themanifold H. A certain amount of air entering the housing 28 through thelower opening 3| is thereby allowed to, flow upwardly past the cooks 48and around the manifold and out through the upper opening 36, whereby tocool the entire assembly to such an extent that the cocks are not heatedenough to have the lubricant therein dried out. There is, therefore, nooccasion for the cocks to stick or turn with difficulty. A' baffle 53,the details of which are hereinafter described, serves to increase thecirculation of air upwardly around the manifold and out through theopening 36 tokeep the manifold as cool as possible.

' The crosspipe 52 is disposed inside the end wall 9 of the burner boxand has the rear end thereof threaded, as appears at 54 in Fig. 2, forconnection with the gas main, and its front end is'preferably cut on amiter like the end of the manifold l1 and welded thereto. Owing to itsproximity with the burners, the pipe 52 would be heated to anobjectionable degree if it were not for the provision of the deflector55 made of sheet metal bent to substantially channel form incross-section, as appears in Fig. 4, and fitting over the pipe 52 fromthe'side and placed in abutment with the inside of the wall 8 forcomplete enclosure of the pipe. The deflector 55 is fastened in place inany suitable manner at the rear end thereof as by means of alug 56projecting upwardly therefrom andfastened to the back wan a as by meansof a bolt 51.

The deflector 55 is held in place at its front end by means of thebaffle 53, as will now appear. The baffle 53 is formed from a singlepiece of sheet metal reaching the full length of the housing '28 andbent to a substantially V-shaped cross-section to provide a front wall58 and a rear wall 59 defining an air pocket 60 therebetween forinsulation of the housing 28 from the combustion chamber. The one end ofthe baffle 53 is notched out at the crotch portion of the V, as appearsat El in Fig. 4, so as to fit over the deflector 55 and hold the same inabutment with the end wall 9. The deflector 55 has the top wall thereofresting on top of the crosspipe '52 for support of the deflector, and itwill be evi- :dent'that since the battle 53 fits over the deflector'55fas just; described, the crosspipe 52 also provides some support forthe baffle. The baffle is disposed with the front wall 58 inclinedupwardly reaching from'a point considerably to the rear and below themanifold IT to a point above and infront of the manifold, the wall 58finding support at its front end on the shoulder 38 previouslymentioned. The rear wall 53 of the baffle extendsupwardly on a shaperincline and just clears'the front end of the bottom plate l8, and

i s' then bent asat 62 to rea h forwardly r ianchorage'between the upperedge of the front of'the cooking top, and it will also appear how lugs;65 formed-on the inside of the front 24 are arranged to supportthe'front end of the wall 59 from beneath. In operation, the'deflector55 minimizes the heating of "the crosspipe 52 so that there is much lessheating of the manifold ll' iby conduction. Although the manifold I1 isin fairly close proximity with the front burnersll3, there is littlechance'for direct heating of the manifold in the operation of theburners, because of the way in which the baflle'53 insulates the housing28 from the combustion chamber. The rear wall 59 of the baffle 53deflects the heat of theburners, and the intervening' air pocket 68minimizes the transfer of heat from the wall 59 to the wall 58byradiation. the-wall 5S derives fromthe wall 59 by conduc tionclination of thefront' wall 58 of the baflle 53 upwardly toward theopening over the manifold ll increases; the circulation of air upwardlythrough the housing '28 around the manifold l1 and out through theopening 36. There is a quite perceptible chimney or stack effect as aresult of air heated, by contact with thecocks Ml and manifold iftending to rise in the housing 28 and escape through the opening 36, andit 13 this action plus the deflection of the baflle 53 that accounts forthe good circulation of air through the housing 28; v

It'is believed the foregoing description conveys a good understanding ofall of the objects and advantages of my invention. The appended claimshave been drawn with a view to covering all legitimate modifications andadaptations.

I claim: i

l. A gas stove comprising a cooking top, a burner therefor, and a frontwall for a manifold housing below the cooking top having a handleopening therein, and an air inlet opening below and an outlet openingabove the handle opening, a manifold beneath the cooking top anddisposed between the air inlet and outlet openings, a cross- I pipereaching rearwardly fromone end of the manifold for supplying gas to thelatter, the crosspipe extending in proximity with the burner, a heatdeflector enclosing said crosspipe to minimize transfer of heat from theburner to the pipe, a baffle substantially parallel with the manifoldand disposed between it and the burner to prevent heat transfer from theburner to the manifold, a cock'communicating with the manifold andarranged to discharge gas to the burner, and a handle disposed outsidethe housing having an operating connection through the handle openingwith the cock for opening and closing the same.

2. A gas stove as set forth in claim 1 wherein the baffle is'soconformed and related to the air inlet and outlet openings whereby todirect incoming air toward the outlet opening for circulation about themanifold, said baffle serving to isolate'the burners from the manifoldto such an extent as to cut down the flow of secondary air thereto fromthe air inlet opening, the stove being provided with auxiliary air inletopenings Such heat as is pretty well dissipated by the air that fcomesin contact therewith which enters the opening "35 and circulates throughthe housing behind the baffle for delivery of additional secondary airto the burners. I

73. A gas stove as set forth in claim 1 wherein the heat deflectorrforthe crosspipe rests on the top of said pipe, and wherein the baflle hastheon'e end thereof formed -to fit over] said deflector whereby thebaffle holds the heat deflector in place on the crosspipe and thecrosspipe is used to support the'baflie. T i

4. A gas stove as set forth in claim 1 wherein the baffle is formed fromsheet metal bent tear;-

proximately V-shaped cross-section whereby to providediverging forwardlyreaching front and rear walls having an air insulating chambertherebetween, the rear wall being inclined in a predetermined relationto the burner: for deflection of heat therefrom, and the front wallbeing conformed and inclined-with relation to the manifold and airinlet' andv outlet openings-to direct incoming air toward the outletopening for circulation about the'manifold. r f

5. A gas stove as set forth in claim 1 wherein the bafile is formed fromsheet metal bent to approximately v -shaped' cross-section whereby toprovide diverging forwardly reaching front and 'rear walls having anair. insulating chamber therebetween, the rear wall being inclined in apredetermined relation to the burner for de: fiection of heat therefrom,and the front wall being conformed and inclined with relation to themanifold and air inlet and outlet openings to ,di- I rect incoming airtoward the outletope'ningfor circulation about the manifold, and whereinthe heat deflector rests on top of the crosspipe, and the adjacent endof the baffle is formed to fit over said deflector whereby to hold thedeflector in place on the crosspipe and at the same time support thebaifle on said pipe;

6. A gas stove comprising a cooking top, a front wall for amanifoldhousing immediately below the cooking top, the cooking tophaving a downwardly projecting front flange resting on a shoulder ontheupper edge of the front wall, the front wall having a handle opening,the upper portion of said housing having an air outlet opening therein,and the lower portion of said housing having an air inlet opening, aburner for the cooking top, a gas supply manifold in said housing in'apredetermined relation to the air outlet cpening, a cool: fordelivering'ga's from the manifold to the burner having an operating stemreaching toward the handle opening, a handle outside the housing havingan operating connecto-n through said opening with said stem, and abafiie disposed substantially parallel with the manifold between thelatter and the burner to fold, and the rear wall be ng inclined upwardlyadjacent the. burner for deflecting heat therefrom, the front -end ofvall being entered in the joint between the cooking top and front wallfor support of the bailie.

'7. A gas stove including in combination, a combustion chamber. heatingburners arranged therein, and a closure plate constituting the frontwall of said chamber, said plate being formed with ports in its lowerpart through which ports air for combustion is entrained, and said plateer compartment, burners therein, a front wall being formed also withports in its upper part through which excess air is vented.

.8. In a gas stove having a cooking top burner compartment, burnerstherein, a front wall for said compartment and a gas supply manifold andcocks communicating therewith for delivery of gas to the burners, saidmanifold and cocks being disposed in said compartment behind the frontwall, said wall being formed with lower and upper openings for inletand. outlet of air respectively, whereby to supply air for combustion tothe burners and surplus air for circulation past the manifold and cocksfor cooling the same.

9. In a gas stove having a cooking top burner compartment, burnerstherein, a front wall for said compartment and a gas supply manifold andcooks communicating therewith for delivery of gas to the burners, saidmanifold and cooks being disposed in said compartment behind the frontwall, said wall being formed with lower and upper openings for inlet andoutlet of air respectively, whereby to supply air for combustion to theburners and surplus air for circulation past the manifold and cooks forcooling the same, the stove including baiile means disposed in theburner compartment between the burners and the manifold and cooks toshield the latter from the heat of the burners, said bafiie means beingso disposed whereby excess air taken in is directed toward the upperoutlet.

10. In a gas stove having a cooking top burnfor said compartment and agas supply manifold and cooks communicating therewith for delivery ofgas to the burners, said manifold and cocks being disposed in saidcompartment behind the front well, said wall being formed with lower andupper openings for inlet and outlet of air respectively, whereby tosupply air for combustion to the burners and surplus air for circulationpast the manifold and cocks for cooling the same, the stove including abatile of V-shaped cross-section with the crotch portion of the Vlowermost, ar ranged between the burners and the manifold and cocks sothat the inner wall deflects heat of the burners away from the manifoldand cooks, and the outer wall deflects excess air toward the upperoutlet, the inner and outer walls being spaced so as to minimize heattransfer from the former to the latter.

11. In a gas stove comprising a cooking top, a gas supply manifoldtherebeneath, gas cocks communicating therewith for delivery of gas toburners disposed beneath the cooking top, and a baille of V-shapedcross-section disposed with the crotch of the v lowermost between theburners and the manifold so that the inner wall deflects heat of theburners away from the manifold, and the outer wall is disposed adjacentthe manifold and spaced from the inner Wall for minimum heat transferfrom the inner wall to the outer wall.

PETER I. HOLLMAN.

